Egg beater



Aug 18, 1925. 1,549,889

R A. MOORE EGG BEATER Filed Sept. 24. 1924 o" [9 O 5 8!! i 1 Patented Aug. 13, E925;

ROBERT A. MOORE, OF NEW YORK, N. Y.,

rarest Fries.

ASSIGNOR 'I'O RAM METAL PRODUCTS. CO.

INC., NEW YORK, N Y A (JOARPQRATION OE NEW YORK.

BE TEB Ap lication filed Septe ber 24, 19%- Serial No. 739,516

To all whom it may concem:

Be it known that 1, ROBERT A. MOORE, a citizen of the United States, residing at New York city, borough of Manhattan, in

the county of New York and State of New York, have invented certain new and useful Improvements in Egg Beaters, of which the following is a specification. This invention relates to stirring and mixing devices, and has particular reference to. articles of that character which are adapted for stirring or mixing foodstuffs, and for general domestic use.

Amongthe objects of this invention is .1 to provide generally a special and novel type of. propeller or agitator blade which is capable of throwing a fluid or other substance in a; predetermined direction, a zone of reduced pressure being created upon that 2 side of the blade, I opposite the direction aforesaid, and means being provided for theflow of another fluid or analogous sub stance through said zone to cause an increase of absolute pressure therein to facili- 2 .tate the throw by thebla-de of the first mentioned fluid as aforesaid.

Another object of this invention is to provide a plurality of concentric propeller or agitator blades capable of throwing a fluid 3 or other substance toward a point in substantially axial relation to said blades, a region of reduced pressure being created upon the sides of said blades opposite the direction of throw, means being provided 3 for the flow of another fluid through said region to cause an increase in absolute pressure therein to facilitate the throw by the blades of the first mentioned fluid as aforesaid, said means providing for the passage & of the second 'mentioned fluid axially toward the point aforesaid to effectively commingle with the other fluid.

Another object of this invention is to provide a plurality of propellers or agi- 1& tators in spacedrelation to each other and each adapted to cause the forward swirling flow of. a fluid, one of said propellers being adapted to receivethe fluid from the other while-in swirling motion and to impart an 5 opposite and reactional swirl and forward e o i y her to- Still another object of this invention is to provide novel means for securing or holdt e dr ing m ha i m of the d v e- With he wed-re a e r bjec s in view the invention consists in the arrangement and con'lbinationof parts hereinafter described and claimed, and while the invention is not restricted to, the exact details of construction disclosed or suggested herein, still for the purpose of illustrating a practical embodiment thereof referenceis had to the accompanying drawings in which like reference characters designate the same parts in the severalviews, and in which. Figure 1 is an elevational view of the entire device.

. Fig, 2 is section taken along the line 2 0f F Fig. 3. is a section on the line 3+3 of Fig. 1.

Fig. 4 isablank of the bracket or supporti g emb Figs. 5. and 6 are sections taken along corresponding lines of Fig, 1.

Fig. 7 is a section on the line 'Z 7 of Fia 6- Referring now more specifically. to the drawings, the driving mechanism of the de vice comprises a gear wheel 10 which is formed preferably of flat metal through which a plurality of uniformly spaced holes whose centers lie on a circle concentric with the gear wheel 10 are punched or otherwise formed whereby the metal between said holes constitutes a series of teeth. A plurality of pinions 12 and 13, at right angles tothe plane of the gear are provided to be driven by said gear, said pinions being stamped from flatnietal and bent or curved about a diameter thereof and with a-radius equal substantially to the radius of said holes whose centers lie on a circle concentric with the gear wheel 10 in. the gear whereby the pinion teeth are readily engageable with Said ar-- e pi s -re in ubstantia ly axial relation to each other. being arranged about a diameter of said gear. They are mounted upon a frame member or bracket 14: to which likewise the 10 is rotatably secured as at 15 and in contact therewith as shown in Fig. 3. The supporting member is formed of a rectangular str p ofsheet material and has spaced cuts or. slits 16 formed. therein parallel to each other and in spaced relation to the ends and side edges of the strip whereby the end portions of the bracket may be struck or bent outwardly of the plane thereof to forin straps l7 and 18 to receive the spindle 19' upon. which the pinions 12 and 13 are mounted. Adjacent to one end of the supporting member and inwardly of the slit 16, an arc shaped strip of metal is removed to form a slot 17, the center of the are lying substantially on the line joining the centers of the straps 17 and 18 whereby the teeth of the pinion 12 may readily pass through said slot for engagement with the gear 10 when the spindle 19 is assembled within said straps. The end of the supporting member opposite to the end aforesaid is formed with an arc shaped portion 18 concentric with the aforesaid line of centers to constitute a guide or stop for the pinion 13 which is arranged to lie in proximity thereto. Thus it will be observed that in general the pinions are located at opposite ends of the bracket or supporting member which in turn is located in central and symmetrical relation to the gear 10. The straps 17 and 18 form bearings for the spindle 19, said spindle being retained within the bearings by abutment of the pinions upon the gear as shown in Fig. 2. It will be noted that only one of the pinions is in fixed relation to the spindle, the other being rotatable and mounted for hearing thereon. Thus the pinion 12 is fixed to the spindle as by means of the deformed and angular characteristic of the end of the spindle, which, however, does not aflect the mechanical operation in the bearing at 17 since sufficient round surface is left upon the spindle to insure an even contact. I have thus devised a simple and inexpensive mounting for the drive mechanism and one which will stand rough usage, particularly as the abutment of one pinion against the gear is balanced by that of the other.

The supporting member 1 1 is formed with a plurality of spaced tongues 20 along the sides thereof which are adapted to be bent inwardly toward each other to embrace the arms or frame members 21 so as to lock the same in relation to each other and the drive mechanism. Said members are bent to embrace a suitable handle 22 at one end of the drive mechanism, and extend in axial relation to the drive mechanism upon the side thereof opposite the side adjacent to the handle. A handle or knob 23 is provided upon the gear whereby the drive mechanism may be actuated when the operator grasps the handle 22 to support the mechanism.

The arms 21 may be formed of an in tegral length of metal bent into substantially loop form at the end remote from the handle and providing a bearing 24: for the spindle 19, said spindle being arranged in central relation to said loop. Upon the spindle and within said loop and in relative proximity to the bearing 2%, a propeller or agitator 25 is fixedly mounted. Another propeller or agitator 26 is provided in coaxial relation with the former and in relative proximity thereto and supported by the connecting members 27 which constitute in eflect a skeletonized or hollow shaft extendbetween the pinion 13 and the agitator 26. Thus while the agitator 25 is rotatable by means of the spindle 19 which is driven by the pinion 12, the agitator 26 is rotatable by the members 27 driven by the pinion 13. Moreover, since the pinions are driven in opposite directions, being on opposite sides of the center at 15, the agitators 25 and 26 will likewise rotate in opposite directions relatively to each other. Lengthwise movement of the members 27 and the spindle 19 is prevented by the pinions which are held against such movement by the member 14 and the gear 10.

The propellers are constructed in a unique manner to secure the maximum rapidity of flow of the fluid within which they are submerged. Thus each propeller comprises a plurality of blades 28 which are inclined at one angle to the plane of the propeller forming a high trailing edge to impart an axial impulse to a fluid. Each of said blades has an upturned end portion or lip 28 which is flared from said trailing edge of the blade outwardly and away from the center of the propeller to impart a centripetal impulse to the fluid. Each blade has thus a high trailing edge which extends about the end of the blade thus forming a working face, the main portion of the blade being adapted to throw a fluid in a direction substantially parallel to the axis, while the portion of the working face at the outer or peripheral end of the blade is adapted to throw the fluid toward a point upon the axis of the propeller. Two component forces are thus set up which are particularly arranged to produce at once the maximum swirl and forward throw of the fluid.

The formation of the blades will cause a zone of reduced pressure to exist along the face of each blade opposite to the working face as shown more particularly in Fig. 7, the direction of motion of the blade being indicated by the ar row a. The surface of the water immediately beneath the blades will lie in spaced relation thereto as shown at 29, while air particles 30 will find their way down through the seething fluid into said Zone of reduced pressure by entering at the outer edge of each blade and passing along the face of it opposite to the working face as indicated by the arrows Z). The effect of having air so enter beneath the blades is to increase the absolute pressure in the zone of reduced pressure, thus preventing retardation of the flow of the fluid under actuation of the propeller. To permit of the most effective commingling of the air and the fluid, the air is permitted to pass from the zone aforesaid and along a path substantially parallel to the propeller axis or agitator to join and mix with the fluid discharged from the propeller. More specifically, holes or passages 31 are provided which are arranged between the center of the propeller and the blades. The air will discharge through these passages to the side of the propeller adjacent to the working faces of the blades, because of the reduced pressure existing in that immediate region owing to the centrifugal swirl of the fluid nearthe plane of the propeller. For the sake of simplified construction certain of the holes 31' may be used for fastening the members 27 to the propeller 26, said members being formed for this purpose with lugs to enter said holes. I

My invention provides in general a stirrer or agitator which is particularly valuable for forming an emulsion, or for mixing air and a liquid, the invention providing for a complete circulation of both the air or other substance and the liquid to cause effective mixin of the two. Moreover, a plurality of propellers or agitators are provided, the blades of one being arranged to throw the fluid in a different direction tangentially than the blades of the other, but each causes the fluid to flow in the same substantially vertical direction, Thus additional mixing and cutting action of the fluid is provided for, the arrange ment being particularly useful when liquids of different densities are to be mixed in which case the lower agitator will engage the lower and heavier fluid while the upper one engages the lighter fluid. In the case of each agitator the flow of air will be the same. Both will effectively mix the fluids and throw them forward with a swirl ing motion. Then air will strike into the swirling mass at the point of maximum agitation and be thoroughly commingled therewith.

Giving to the fact that the blades of the respective propellers are rotatable in opp0- site directions, and are likewise inclined oppositely to each other, the direction of tangential flow imparted to the fluid by one propeller will be opposite to that imparted thereto by the other propeller. More over, with the presence of the vertical flow component, the lower propeller will cause the-fluid to strike the working face of the upper propeller with considerable force and will result generally in a higher relative velocity of the fluid at the upper propeller than at the lower propeller. This will result in an increase in suction beneath the working face of the blade of the upper propeller. Consequently the entrainment of air beneath said working face will be considerably increased, since it is clear that the entrainment depends upon the suction which must in turn depend upon the difference in absolute pressure between the faces of the blade.

For the reasons stated above, it is clear that if it is desirableas has been indicated hereinbefore to space the openings 81 away from the working face so as not to permit a downward flow of the fluid therethrough when the fluid reacts against the vertical flow component of the working face as that would impede the entrainment of air bencath the blade, it is even more desirable to so arrange these openings in spaced re peller, which receives the fluid with an initial tangential velocity imparted thereto by the lower propeller, said velocity having a component directed against the working face'of the upper propeller and whereby the pressure and reaction of the fluid thereon is considerably increased. But the positioning of the holes aforesaid permits of uniform and unimpeded entrainment of air, thus insuring a greater lift and circulation of the fluid as well as the readier formation of an emulsion.

I claim:

1. The herein described propeller having a blade a portion of whose working face along an edge thereof is inclined to the plane of the propeller so as to cause a suc tion beneath said blade and along said edge to entrain air particles, said propeller having a hole through its hub adjacent to its axis and communicating with both faces of the blade to permit the flow therethrough of air entrained beneath the blade as aforesaid and which flows toward the central region of reduced pressure of the propeller, said blade causing a lift of the fluid and consequently an increase in pressure at its working face through the operation of the inclined portion thereof, said blade retaining the fluid pressure above the working face thereof, being imperforate remote from the hub, to insure the positive flow of the air beneath said blade toward the central region of reduced pressure as aforesaid. i v

2. The herein'described agitator comprising a plurality of co-axial propellers ar ranged to rotate in planes in proximity to each other and in relatively opposite directions, each of said propellers having a blade a portion of whose working face is inclined to the plane of the propeller so as to cause a suction beneath said blade and at the trailing edge thereof to entrain air particles, said working face being spaced along the blade away from the axis of the propeller, the hub of the propeller being perforated by an opening communicating with the upper and lower faces thereof to permit the fiow of air therethrough at a portion of the propeller which being spaced from the working face of the blade is not subject to fluid pressure and reaction, the blades of the individual propellers being oppositely inclined whereby the blade of one propeller is adapted to throw a fluid against and at an angle to the working face of the blade of the upper propeller thus increasing the pressure and reaction on said working face, said.

working face being impervious to the flow of fluid, thus causing the fluid to leave the blade wholly and uniformly with a high relative velocity and permitting an increased and unimpeded suction and flow of air particles beneath said working face toward and through the opening in the propeller hub at the region of reduced pressure spaced from the working face.

3. In a propeller, a blade having an inclined working face to form a high trailing edge for the purpose of causing a fluid to flow axially of the propeller, the inclined portion of said blade being imperforate and terminating in a portion having a substantially flat face extending along said trailing edge and lying in a plane substantially perpendicular to the axis of the propeller and forming beneath the blade a channel extending longitudinally of the blade.

i. A device as set forth in claim 3 Wherein said propeller is provided with an opening through its hub adjacent to its axis communicating with the faces of said blade and said channel to permit air particles to flow along within said channel and beneath said blade and to be finally discharged at the central region of reduced pressure of the propeller through said opening to the upper side of the propeller.

In testimony whereof I aflix my signature.

ROBERT A. MOORE. 

